rs1008860336
Variant summary
Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PP3_ModeratePM1PS4_Supporting
This summary comes from the ClinGen Evidence Repository: This pathogenicity assessment is relevant only for malignant hyperthermia susceptibility (MHS) inherited in an autosomal dominant pattern. Variants in RYR1 can also cause other myopathies inherited in an autosomal dominant pattern or in an autosomal recessive pattern. Some of these disorders may predispose individuals to malignant hyperthermia. RYR1 variants may also contribute to a malignant hyperthermia reaction in combination with other genetic and non-genetic factors and the clinician needs to consider such factors in making management decisions.This sequence variant predicts a substitution of leucine with proline at codon 487 of the RYR1 protein, p.(Leu487Pro). This variant was not present in a large population database (gnomAD) at the time this variant was interpreted. This variant has been reported in an individual with a personal or family history of an MH episode and a positive in vitro contracture test (IVCT) or caffeine halothane contracture test (CHCT) result (if the proband was unavailable for testing, a positive diagnostic test result in a mutation-positive relative was counted), PS4_Supporting (PMID:23558838). No functional studies were identified for this variant. This variant resides in a region of RYR1 considered to be a hotspot for pathogenic variants that contribute to MHS, PM1 (PMID:21118704). A REVEL score >0.85 (0.962) supports a pathogenic status for this variant, PP3_Moderate. This variant has been classified as a Variant of Unknown Significance. Criteria implemented: PS4_Supporting, PM1, PP3_Moderate. LINK:https://erepo.genome.network/evrepo/ui/classification/CA405688435/MONDO:0018493/012
Frequency
Consequence
NM_000540.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 5 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
RYR1 | NM_000540.3 | c.1460T>C | p.Leu487Pro | missense_variant | 14/106 | ENST00000359596.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
RYR1 | ENST00000359596.8 | c.1460T>C | p.Leu487Pro | missense_variant | 14/106 | 5 | NM_000540.3 | A2 | |
RYR1 | ENST00000355481.8 | c.1460T>C | p.Leu487Pro | missense_variant | 14/105 | 1 | P4 | ||
RYR1 | ENST00000599547.6 | c.1460T>C | p.Leu487Pro | missense_variant, NMD_transcript_variant | 14/80 | 2 |
Frequencies
GnomAD3 genomes ? Cov.: 31
GnomAD4 exome Cov.: 54
GnomAD4 genome ? Cov.: 31
ClinVar
Submissions by phenotype
RYR1-related disorder Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | Invitae | Jul 19, 2022 | This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 487 of the RYR1 protein (p.Leu487Pro). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt RYR1 protein function. ClinVar contains an entry for this variant (Variation ID: 567662). This missense change has been observed in individuals with a personal or family history of malignant hyperthermia (PMID: 23558838; Invitae). This variant is not present in population databases (gnomAD no frequency). - |
Malignant hyperthermia of anesthesia Uncertain:1
Uncertain significance, reviewed by expert panel | curation | ClinGen Malignant Hyperthermia Susceptibility Variant Curation Expert Panel, ClinGen | Apr 06, 2023 | This pathogenicity assessment is relevant only for malignant hyperthermia susceptibility (MHS) inherited in an autosomal dominant pattern. Variants in RYR1 can also cause other myopathies inherited in an autosomal dominant pattern or in an autosomal recessive pattern. Some of these disorders may predispose individuals to malignant hyperthermia. RYR1 variants may also contribute to a malignant hyperthermia reaction in combination with other genetic and non-genetic factors and the clinician needs to consider such factors in making management decisions. This sequence variant predicts a substitution of leucine with proline at codon 487 of the RYR1 protein, p.(Leu487Pro). This variant was not present in a large population database (gnomAD) at the time this variant was interpreted. This variant has been reported in an individual with a personal or family history of an MH episode and a positive in vitro contracture test (IVCT) or caffeine halothane contracture test (CHCT) result (if the proband was unavailable for testing, a positive diagnostic test result in a mutation-positive relative was counted), PS4_Supporting (PMID:23558838). No functional studies were identified for this variant. This variant resides in a region of RYR1 considered to be a hotspot for pathogenic variants that contribute to MHS, PM1 (PMID: 21118704). A REVEL score >0.85 (0.962) supports a pathogenic status for this variant, PP3_Moderate. This variant has been classified as a Variant of Unknown Significance. Criteria implemented: PS4_Supporting, PM1, PP3_Moderate. - |
Central core myopathy;C1840365:King Denborough syndrome;C1850674:Congenital multicore myopathy with external ophthalmoplegia Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | New York Genome Center | Jun 30, 2021 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at